Fracture and damage localization in volcanic edifice rocks from El Hierro, Stromboli and Tenerife

Harnett, Claire E.; Benson, Philip M.; Rowley, Pete; Fazio, Marco

Abstract

We present elastic wave velocity and strength data from a suite of three volcanic rocks taken from the volcanic edifices of El Hierro and Tenerife (Canary Islands, Spain), and Stromboli (Aeolian Islands, Italy). These rocks span a range of porosity and are taken from volcanoes that suffer from edifice instability. We measure elastic wave velocities at known incident angles to the generated through-going fault as a function of imposed strain, and examine the effect of the damage zone on P-wave velocity. Such data are important as field measurements of elastic wave tomography are key tools for understanding volcanic regions, yet hidden fractures are likely to have a significant effect on elastic wave velocity. We then use elastic wave velocity evolution to calculate concomitant crack density evolution which ranges from 0 to 0.17: highest values were correlated to the damage zone in rocks with the highest initial porosity.

Citation

Harnett, C. E., Benson, P. M., Rowley, P., & Fazio, M. (2018). Fracture and damage localization in volcanic edifice rocks from El Hierro, Stromboli and Tenerife. Scientific reports, 8(1), Article 1942. https://doi.org/10.1038/s41598-018-20442-w

• Acceptance Date: Jan 10, 2018
• Online Publication Date: Jan 31, 2018
• Publication Date: Dec 1, 2018
• Deposit Date: Jan 31, 2018
• Publicly Available Date: Jan 31, 2018
• Journal: Scientific Reports
• Print ISSN: 2045-2322
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 8
• Issue: 1
• Article Number: 1942
• DOI: https://doi.org/10.1038/s41598-018-20442-w
• Keywords: Geophysics; Natural hazards; Seismology; Volcanology
• Public URL: https://hull-repository.worktribe.com/output/565127
• Publisher URL: https://www.nature.com/articles/s41598-018-20442-w
• Contract Date: Jan 31, 2018